Second Life viewer sources 1.13.2.12

1 files changed, 404 insertions, 0 deletions

diff --git a/linden/indra/llmath/v4math.h b/linden/indra/llmath/v4math.h
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+/** 
+ * @file v4math.h
+ * @brief LLVector4 class header file.
+ *
+ * Copyright (c) 2000-2007, Linden Research, Inc.
+ * 
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlife.com/developers/opensource/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at http://secondlife.com/developers/opensource/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ */
+
+#ifndef LL_V4MATH_H
+#define LL_V4MATH_H
+
+#include "llerror.h"
+#include "llmath.h"
+#include "v3math.h"
+
+class LLMatrix3;
+class LLMatrix4;
+class LLQuaternion;
+
+//  LLVector4 = |x y z w|
+
+static const U32 LENGTHOFVECTOR4 = 4;
+
+#if LL_WINDOWS
+__declspec( align(16) )
+#endif
+
+class LLVector4
+{
+        public:
+                F32 mV[LENGTHOFVECTOR4];
+                LLVector4();                                            // Initializes LLVector4 to (0, 0, 0, 1)
+                explicit LLVector4(const F32 *vec);                     // Initializes LLVector4 to (vec[0]. vec[1], vec[2], 1)
+                explicit LLVector4(const LLVector3 &vec);                       // Initializes LLVector4 to (vec, 1)
+                explicit LLVector4(const LLVector3 &vec, F32 w);        // Initializes LLVector4 to (vec, w)
+                LLVector4(F32 x, F32 y, F32 z);         // Initializes LLVector4 to (x. y, z, 1)
+                LLVector4(F32 x, F32 y, F32 z, F32 w);
+
+                LLSD getValue() const
+                {
+                        LLSD ret;
+                        ret[0] = mV[0];
+                        ret[1] = mV[1];
+                        ret[2] = mV[2];
+                        ret[3] = mV[3];
+                        return ret;
+                }
+
+                inline BOOL isFinite() const;                                                                   // checks to see if all values of LLVector3 are finite
+
+                inline void     clearVec();                                                     // Clears LLVector4 to (0, 0, 0, 1)
+                inline void     zeroVec();                                                      // zero LLVector4 to (0, 0, 0, 0)
+                inline void     setVec(F32 x, F32 y, F32 z);            // Sets LLVector4 to (x, y, z, 1)
+                inline void     setVec(F32 x, F32 y, F32 z, F32 w);     // Sets LLVector4 to (x, y, z, w)
+                inline void     setVec(const LLVector4 &vec);           // Sets LLVector4 to vec
+                inline void     setVec(const LLVector3 &vec, F32 w = 1.f); // Sets LLVector4 to LLVector3 vec
+                inline void     setVec(const F32 *vec);                         // Sets LLVector4 to vec
+
+                F32                     magVec() const;                         // Returns magnitude of LLVector4
+                F32                     magVecSquared() const;          // Returns magnitude squared of LLVector4
+                F32                     normVec();                                      // Normalizes and returns the magnitude of LLVector4
+
+                // Sets all values to absolute value of their original values
+                // Returns TRUE if data changed
+                BOOL abs();
+                
+                BOOL isExactlyClear() const             { return (mV[VW] == 1.0f) && !mV[VX] && !mV[VY] && !mV[VZ]; }
+                BOOL isExactlyZero() const              { return !mV[VW] && !mV[VX] && !mV[VY] && !mV[VZ]; }
+
+                const LLVector4&        rotVec(F32 angle, const LLVector4 &vec);        // Rotates about vec by angle radians
+                const LLVector4&        rotVec(F32 angle, F32 x, F32 y, F32 z);         // Rotates about x,y,z by angle radians
+                const LLVector4&        rotVec(const LLMatrix4 &mat);                           // Rotates by MAT4 mat
+                const LLVector4&        rotVec(const LLQuaternion &q);                          // Rotates by QUAT q
+
+                const LLVector4&        scaleVec(const LLVector4& vec); // Scales component-wise by vec
+
+                F32 operator[](int idx) const { return mV[idx]; }
+                F32 &operator[](int idx) { return mV[idx]; }
+        
+                friend std::ostream&     operator<<(std::ostream& s, const LLVector4 &a);               // Print a
+                friend LLVector4 operator+(const LLVector4 &a, const LLVector4 &b);     // Return vector a + b
+                friend LLVector4 operator-(const LLVector4 &a, const LLVector4 &b);     // Return vector a minus b
+                friend F32  operator*(const LLVector4 &a, const LLVector4 &b);          // Return a dot b
+                friend LLVector4 operator%(const LLVector4 &a, const LLVector4 &b);     // Return a cross b
+                friend LLVector4 operator/(const LLVector4 &a, F32 k);                          // Return a divided by scaler k
+                friend LLVector4 operator*(const LLVector4 &a, F32 k);                          // Return a times scaler k
+                friend LLVector4 operator*(F32 k, const LLVector4 &a);                          // Return a times scaler k
+                friend bool operator==(const LLVector4 &a, const LLVector4 &b);         // Return a == b
+                friend bool operator!=(const LLVector4 &a, const LLVector4 &b);         // Return a != b
+
+                friend const LLVector4& operator+=(LLVector4 &a, const LLVector4 &b);   // Return vector a + b
+                friend const LLVector4& operator-=(LLVector4 &a, const LLVector4 &b);   // Return vector a minus b
+                friend const LLVector4& operator%=(LLVector4 &a, const LLVector4 &b);   // Return a cross b
+                friend const LLVector4& operator*=(LLVector4 &a, F32 k);                                // Return a times scaler k
+                friend const LLVector4& operator/=(LLVector4 &a, F32 k);                                // Return a divided by scaler k
+
+                friend LLVector4 operator-(const LLVector4 &a);                                 // Return vector -a
+}
+#if LL_DARWIN
+__attribute__ ((aligned (16)))
+#endif
+;
+
+
+// Non-member functions 
+F32 angle_between(const LLVector4 &a, const LLVector4 &b);              // Returns angle (radians) between a and b
+BOOL are_parallel(const LLVector4 &a, const LLVector4 &b, F32 epsilon=F_APPROXIMATELY_ZERO);            // Returns TRUE if a and b are very close to parallel
+F32     dist_vec(const LLVector4 &a, const LLVector4 &b);                       // Returns distance between a and b
+F32     dist_vec_squared(const LLVector4 &a, const LLVector4 &b);       // Returns distance squared between a and b
+LLVector3       vec4to3(const LLVector4 &vec);
+LLVector4       vec3to4(const LLVector3 &vec);
+LLVector4 lerp(const LLVector4 &a, const LLVector4 &b, F32 u); // Returns a vector that is a linear interpolation between a and b
+
+// Constructors
+
+inline LLVector4::LLVector4(void)
+{
+        mV[VX] = 0.f;
+        mV[VY] = 0.f;
+        mV[VZ] = 0.f;
+        mV[VW] = 1.f;
+}
+
+inline LLVector4::LLVector4(F32 x, F32 y, F32 z)
+{
+        mV[VX] = x;
+        mV[VY] = y;
+        mV[VZ] = z;
+        mV[VW] = 1.f;
+}
+
+inline LLVector4::LLVector4(F32 x, F32 y, F32 z, F32 w)
+{
+        mV[VX] = x;
+        mV[VY] = y;
+        mV[VZ] = z;
+        mV[VW] = w;
+}
+
+inline LLVector4::LLVector4(const F32 *vec)
+{
+        mV[VX] = vec[VX];
+        mV[VY] = vec[VY];
+        mV[VZ] = vec[VZ];
+        mV[VW] = vec[VW];
+}
+
+inline LLVector4::LLVector4(const LLVector3 &vec)
+{
+        mV[VX] = vec.mV[VX];
+        mV[VY] = vec.mV[VY];
+        mV[VZ] = vec.mV[VZ];
+        mV[VW] = 1.f;
+}
+
+inline LLVector4::LLVector4(const LLVector3 &vec, F32 w)
+{
+        mV[VX] = vec.mV[VX];
+        mV[VY] = vec.mV[VY];
+        mV[VZ] = vec.mV[VZ];
+        mV[VW] = w;
+}
+
+
+inline BOOL LLVector4::isFinite() const
+{
+        return (llfinite(mV[VX]) && llfinite(mV[VY]) && llfinite(mV[VZ]) && llfinite(mV[VW]));
+}
+
+// Clear and Assignment Functions
+
+inline void     LLVector4::clearVec(void)
+{
+        mV[VX] = 0.f;
+        mV[VY] = 0.f;
+        mV[VZ] = 0.f;
+        mV[VW] = 1.f;
+}
+
+inline void     LLVector4::zeroVec(void)
+{
+        mV[VX] = 0.f;
+        mV[VY] = 0.f;
+        mV[VZ] = 0.f;
+        mV[VW] = 0.f;
+}
+
+inline void     LLVector4::setVec(F32 x, F32 y, F32 z)
+{
+        mV[VX] = x;
+        mV[VY] = y;
+        mV[VZ] = z;
+        mV[VW] = 1.f;
+}
+
+inline void     LLVector4::setVec(F32 x, F32 y, F32 z, F32 w)
+{
+        mV[VX] = x;
+        mV[VY] = y;
+        mV[VZ] = z;
+        mV[VW] = w;
+}
+
+inline void     LLVector4::setVec(const LLVector4 &vec)
+{
+        mV[VX] = vec.mV[VX];
+        mV[VY] = vec.mV[VY];
+        mV[VZ] = vec.mV[VZ];
+        mV[VW] = vec.mV[VW];
+}
+
+inline void     LLVector4::setVec(const LLVector3 &vec, F32 w)
+{
+        mV[VX] = vec.mV[VX];
+        mV[VY] = vec.mV[VY];
+        mV[VZ] = vec.mV[VZ];
+        mV[VW] = w;
+}
+
+inline void     LLVector4::setVec(const F32 *vec)
+{
+        mV[VX] = vec[VX];
+        mV[VY] = vec[VY];
+        mV[VZ] = vec[VZ];
+        mV[VW] = vec[VW];
+}
+
+// LLVector4 Magnitude and Normalization Functions
+
+inline F32              LLVector4::magVec(void) const
+{
+        return fsqrtf(mV[VX]*mV[VX] + mV[VY]*mV[VY] + mV[VZ]*mV[VZ]);
+}
+
+inline F32              LLVector4::magVecSquared(void) const
+{
+        return mV[VX]*mV[VX] + mV[VY]*mV[VY] + mV[VZ]*mV[VZ];
+}
+
+// LLVector4 Operators
+
+inline LLVector4 operator+(const LLVector4 &a, const LLVector4 &b)
+{
+        LLVector4 c(a);
+        return c += b;
+}
+
+inline LLVector4 operator-(const LLVector4 &a, const LLVector4 &b)
+{
+        LLVector4 c(a);
+        return c -= b;
+}
+
+inline F32  operator*(const LLVector4 &a, const LLVector4 &b)
+{
+        return (a.mV[VX]*b.mV[VX] + a.mV[VY]*b.mV[VY] + a.mV[VZ]*b.mV[VZ]);
+}
+
+inline LLVector4 operator%(const LLVector4 &a, const LLVector4 &b)
+{
+        return LLVector4(a.mV[VY]*b.mV[VZ] - b.mV[VY]*a.mV[VZ], a.mV[VZ]*b.mV[VX] - b.mV[VZ]*a.mV[VX], a.mV[VX]*b.mV[VY] - b.mV[VX]*a.mV[VY]);
+}
+
+inline LLVector4 operator/(const LLVector4 &a, F32 k)
+{
+        F32 t = 1.f / k;
+        return LLVector4( a.mV[VX] * t, a.mV[VY] * t, a.mV[VZ] * t );
+}
+
+
+inline LLVector4 operator*(const LLVector4 &a, F32 k)
+{
+        return LLVector4( a.mV[VX] * k, a.mV[VY] * k, a.mV[VZ] * k );
+}
+
+inline LLVector4 operator*(F32 k, const LLVector4 &a)
+{
+        return LLVector4( a.mV[VX] * k, a.mV[VY] * k, a.mV[VZ] * k );
+}
+
+inline bool operator==(const LLVector4 &a, const LLVector4 &b)
+{
+        return (  (a.mV[VX] == b.mV[VX])
+                        &&(a.mV[VY] == b.mV[VY])
+                        &&(a.mV[VZ] == b.mV[VZ]));
+}
+
+inline bool operator!=(const LLVector4 &a, const LLVector4 &b)
+{
+        return (  (a.mV[VX] != b.mV[VX])
+                        ||(a.mV[VY] != b.mV[VY])
+                        ||(a.mV[VZ] != b.mV[VZ]));
+}
+
+inline const LLVector4& operator+=(LLVector4 &a, const LLVector4 &b)
+{
+        a.mV[VX] += b.mV[VX];
+        a.mV[VY] += b.mV[VY];
+        a.mV[VZ] += b.mV[VZ];
+        return a;
+}
+
+inline const LLVector4& operator-=(LLVector4 &a, const LLVector4 &b)
+{
+        a.mV[VX] -= b.mV[VX];
+        a.mV[VY] -= b.mV[VY];
+        a.mV[VZ] -= b.mV[VZ];
+        return a;
+}
+
+inline const LLVector4& operator%=(LLVector4 &a, const LLVector4 &b)
+{
+        LLVector4 ret(a.mV[VY]*b.mV[VZ] - b.mV[VY]*a.mV[VZ], a.mV[VZ]*b.mV[VX] - b.mV[VZ]*a.mV[VX], a.mV[VX]*b.mV[VY] - b.mV[VX]*a.mV[VY]);
+        a = ret;
+        return a;
+}
+
+inline const LLVector4& operator*=(LLVector4 &a, F32 k)
+{
+        a.mV[VX] *= k;
+        a.mV[VY] *= k;
+        a.mV[VZ] *= k;
+        return a;
+}
+
+inline const LLVector4& operator/=(LLVector4 &a, F32 k)
+{
+        F32 t = 1.f / k;
+        a.mV[VX] *= t;
+        a.mV[VY] *= t;
+        a.mV[VZ] *= t;
+        return a;
+}
+
+inline LLVector4 operator-(const LLVector4 &a)
+{
+        return LLVector4( -a.mV[VX], -a.mV[VY], -a.mV[VZ] );
+}
+
+inline F32      dist_vec(const LLVector4 &a, const LLVector4 &b)
+{
+        LLVector4 vec = a - b;
+        return (vec.magVec());
+}
+
+inline F32      dist_vec_squared(const LLVector4 &a, const LLVector4 &b)
+{
+        LLVector4 vec = a - b;
+        return (vec.magVecSquared());
+}
+
+inline LLVector4 lerp(const LLVector4 &a, const LLVector4 &b, F32 u)
+{
+        return LLVector4(
+                a.mV[VX] + (b.mV[VX] - a.mV[VX]) * u,
+                a.mV[VY] + (b.mV[VY] - a.mV[VY]) * u,
+                a.mV[VZ] + (b.mV[VZ] - a.mV[VZ]) * u,
+                a.mV[VW] + (b.mV[VW] - a.mV[VW]) * u);
+}
+
+inline F32              LLVector4::normVec(void)
+{
+        F32 mag = fsqrtf(mV[VX]*mV[VX] + mV[VY]*mV[VY] + mV[VZ]*mV[VZ]);
+        F32 oomag;
+
+        if (mag > FP_MAG_THRESHOLD)
+        {
+                oomag = 1.f/mag;
+                mV[VX] *= oomag;
+                mV[VY] *= oomag;
+                mV[VZ] *= oomag;
+        }
+        else
+        {
+                mV[0] = 0.f;
+                mV[1] = 0.f;
+                mV[2] = 0.f;
+                mag = 0;
+        }
+        return (mag);
+}
+
+
+#endif
+